Learn the importance of dynamically balancing a pumps' rotating components
Everyone agrees that balancing the rotating components of a centrifugal pump is a good idea, but it's seldom done. Evidently it doesn't appear to be too important or it would be receiving some sort of priority when the pump is being overhauled or rebuilt. You will be pleased to know this is not the case at Qualtex.
What does an out of balance shaft in your pump do at electric motor speeds? The bearings will experience higher loading that will translate to premature failure.
The mechanical seal faces can separate because of the induced vibration and shaft run out.
The seal faces can become damaged as the vibration causes the carbon to bounce against the hard face.
Seal drive lugs wheel experience premature wear.
Shaft fretting will increase dramatically under bearing surfaces.
What causes a pump shaft to go out of dynamic balance, assuming it was balanced at pump assembly?
Product attaches to the impeller.
Impeller wear and damage caused by erosion and corrosion from product.
A seal or sleeve that is not concentric to the shaft. Set screws guarantee that it will not be concentric.
The coupling, impeller, mechanical seal, bearings, sleeve, keys, etc. were not balanced as an assembly.
The impeller diameter was reduced and not re-balanced.
At Qualtex we generally balance to grade G1 (which is above most factory design specifications) we are able to balance to tighter tolerance’s, depending on your specific balance requirements.
